APA (7th ed.) Citation

United States. Forest Service. (1941). Challis National Forest, Idaho. [s.n.].

Chicago Style (17th ed.) Citation

United States. Forest Service. Challis National Forest, Idaho. [Washington]: [s.n.], 1941.

MLA (9th ed.) Citation

United States. Forest Service. Challis National Forest, Idaho. [s.n.], 1941.

Warning: These citations may not always be 100% accurate.